Using thermal time models to predict the impact of assisted migration on the synchronization of germination and shoot emergence of oak (Quercus robur L.)

Table 2 Estimates of the thermal time parameters for germination

Parameter	Estimate ± S.E. for English acorns	Estimate ± S.E. for Italian acorns
Base temperature (°C)	−1.5 ± 0.7	−3.3 ± 0.9
Thermal time for 50 % germination (θ ₅₀) (degree-weeks)	53.3 ± 4.4	61.0 ± 5.2
SD	35.7 ± 3.4	34.7 ± 3.5
β ₁	−2.713 ± 0.213	−3.190 ± 0.241
β ₂	0.051 ± 0.005	0.052 ± 0.005

ISSN: 1297-966X